brumbaugh



A. K. BRUMBAUGH, 1. W. BEDDING AND L. S. CLARKE.

XPLO8WE PROJECHLE.

APPucAHoa HLED JAN. 5. IEH9.

Patented Feb. 1,1921.

' 2 SHEETSSHEET I.

. imim flndmw KBrumMay/l James lllliuiding' A. K. BRUIVIBAWGH J W.REDDING AND L. S. CLARKE.

{XPLUSWE PRUJECTILE.

APPUCAHON mu) JAN. [5, 1919.

1,367,234. Patented Feb. 1,1921

2 SHEETS-SHEEI 2.

(5a as r \Y UNITED STATES PATENT OFFICE.

ANDREW I. BEUMBAUGK. OF

ABDMORE, JAMES W. BEDDING, OF PHILADELPKLA,

AND LOUIS 8. CLARKE. F HAVEBFOED, NNSYLVANIA; SAID BRUIIQLUQH m BEDDINGASBIQHOBS T0 SAID CLARKE.

EXPLOSIVE PBOJECTILE.

Specification 0! Letters Pltent.

Patented Feb. 1, 192

To all whom it may concern:

explosion. depending! Be it known that. we, .\Nmu'.\\' K. llnuuoanun, ofArdmore, in the county of Montornery and Shite of Pennsylvania, Jannaltnnntxo. of Philadelphia. in the county of Philadelphia. and State oflenus lvnuia, and LOUIS $.Cmlnta, of IlttVt'jfOlt in the county ofMontgomery and State of Penn sylvnnia have jointly invented certain newand useful Improvements in Explosive l'rojectiles, whereof the followingis n specification, reference being bad to the accompanying drawings.

The invention relnlvs tn i-xplosive proled-lies of the class gent-rallyknown as bombs. and morn especially to that type of such projectilesintended to he dropped from aircraft.

It is requisite that a weapon of the rlass refened to be universallyapplicable in attacks both upon land and at sea. lln-rnbv pi'esaentiuditi'crvutronditions under whirl detonation is to he controlled inordt'r to he most oli'ecliw. In certain instnuros. di-luyrd detonationis most desirable for example. in attacks at' sea upnn submarinesor,mine fields whigh arv'at a considerable distant-o holow tho surfailovel. or again in land attarks-npon buildings, etc... where tho hostwsnlts are attained when the explosion octlllS after a substantialpcnctmtiou into the interior. dt-tonnlinn is moot dosirahhan in attacksupon surl'aco roe-Hols nlloat. or in gcnond land bombing.

With these ends in view. we have invented a pr'ojt-t-tilo with adetonation morlianiam \vhirh in automation] y and srlvrtivoly u lomhlofor either delayed or instantaneous enlirrlv upon the physical nature ofthe material or aullstaiiru encountered.

'l'he iuvpnt-ion also tximprohcnda a detonating mechanism for exp naive.projectiles 'llll'll uu'c-huninm in normally maintainer in oal'i-" ornuarml-d pm-iition. but which,

upon release. is oupahlo of self setting in n" wnnpamtivi-ly short limointerval. in roadinew for lll'ltllltlllflll under either-of theconditions ahovo mtjorth. The interval is hon'orrrofnnllicirnt durationto insure that the projvetila has. reached a safe distant-o llIl-Obefore the drtnuating from the amp mu-hanism is Qt-116mb) nllordlngprotec- In other instant-rs. instnntauwus' tion against. premature oraccidental exploston.

The invention further com rehends certain other udjunctire contro lingfeatures which will he host understood by reference to the drawings inwhich,

Fwure I, is u lon%itudinal section through the Forward end 0 anexplosive projectile conveniently embodying our inventions In thisillustration the various parts of the det onatiug merhunism are shown in'their normal or sa fe" relation.

1' 1g. II, is a perspective view of thofiring plunger, a portion of theup r and having een removed to show the re ative ositions of the innerends of the delay an impact firing pins.

. Fig. Ill. is a view similar to Fig. II, but observed from anotherangle and showin the relative. positions of the. forward ends 0 thodelay and impact firing pins.

Fig. l\'. is a detail sect on on the line IV-IV in Fig. l.

Fig. V. is a \ltW similar to Fig. I, in a piano at -l5 llttjlt'tts fromthe latter, and showing the rt-lativu positions occupied bv the variouselements of the detouatini: morhnuism when. "armed," in-rcadiness fordetonation.

Fig. V], is a pvrswwlivo view of the annnlns against \hlt'll the firingpins react-in effecting the detonation ot' the projectile.

Figs. VII and Vlll. are detail sectional views taken res XtliVtl on thelines Vll-VIl and Vlll-r'lll of Fig. V.

The pmjt-t'tilr .lo whirl: our invention is applied in thoilllntratious. is of standard form, consisting of an elongated tubularbod portion 1. int-losing a chamber 2, in which the main explosivecharge is stored. This body portion is supplemented b ltaperetl nosepiece 8. internally thread at the. smaller end as indicntcdnt 4. forengugenn-ntwith the ferrule 5. of tube 6. which.

41 action of a suitable guide tai I the re eller bl dee. Fl 78 thus reresented in Fig.3! erein the armed o p p a get w w. 'ositior i and readyto efl'eizt detonation. It

pended from a pivot pin 80, and is adapted normally to be fixed againstmovement by l t-important touote that the final portion oi n cotter pin81, which is provided with a be pro ion of the plunger is accomsuitablehandle 83,.which is attached to an 'plishecl y.virtue of the threadedenga eappropriate controlling mechanism (not ment of the propeller shaltwith the mem r s own) operable at the will of the operator. 36, alone,no thet m the -|.rmed" position, B this means, the aviator is enabled tothe plunger is freed for independent longirelease the projectile eitherwith or without tuclinal motion in the guide tube 6. Such 10 the cotterpin. Such a provision is imindepende t motion is however Prevented 1oportant since is sometimes necessary in during flig tsincethclowerendsothe delay emergencies to drop bombs upon. friendly firing pine 30-30,still serve toepeoe the territory in order to lighten air craft, of theplunger from the reaction memberpthe croae clirigible balloon ty e topermit maneuverpins which the said pins are secured being us ing.Likewise in ydro-neroplnne epere- I so cient strength to preventdislodgment. 80 tion it is sometimes necessary to discard Detonation ofthe projectile is automatithe bombs in reducing weight to permit ancnlly and selectively accomplished in'two cension under reduced enginepower. These ways depending upon the physical nature of conditions areof course, abnormal, but when the object or medium encountered. We willthus released, the projectiles are safe ugtrinst first describe thedelayed action which is es explosion b virtue of the retained cotterfollows: E21 by whic the propeller locking device is When the rogress ofthe projectile is ended against motion. In normal opeiation, denly retared, for example, by striking ugon wlthdrawal of the cotter pin Bl,tingle! water, the momentum of the plan er overwill readily ylelcl tothe rotation of t 6 i-ornes the resistance offered by the and cross 90propeller, the curved edge 79, sliding freely ping-3H2,-by which thedelay firing pins over the rounded backs of the propeller 30, Jim tain dThese pins are thus blades. The sum ng of the fin{.,' er about itssheared by the independent movement ofthc pivot is re strictez to onedirection only, a lan ar with respect to the firing pins 30, Bio qmgProvided for i P P the (lWt'l' ends of which react. against the 9 he Mil0f t e d fl fl methflmsm member 36, in a manner already noted. As may bebriefly described as f l a consequence of the longer movement, the Inreleasing the projectile from the air primers (l0, arclnougiit intoforcible contact craft, the cotter pin l, of the propeller lo 'k withthe respective delay firing pins 30, and 35 is automatically withdrawnby virtue of its discharged, the-ruby ignitingthe fuse formed 100 fixedattachment as already described. Conby tho slow burning powder inthcchunnela sequent upon its release, the projectile im-' 53, consumedin ono and four fifths secmcdiately assumes the vertical posltioniliuflonds which in turn causes the explosion of ,through the tholmoster charge and the main charge in not shown) the chamber 2, throughthe setting oil of the such as is ordinarily provided or tlus purblasting cup 50. By reason of the time rcpose, The propeller having beenout frco quirod for the consumption of the slow rotates in a counterclock wise direction looming flu-nu owdcr, the pro'eotile travels aunder the iropnlsion afforded by the action (Olll-tltifiltthlfititifltntl'. lmlow t in surface level -trntcd in Fig. I, of the druwinfg4 5 of the air arm descent. In Fig. Lit will of the water beforedetonation takes place.

he noted that mth the anvil 86, and the This feature is of importance inamount-ion plungorflfl no in threaded engagomentwith with altnoka uponmlbmurinon, mine fields, thepmpelicr shaft and-an a result, will be i-uDelayed dotmuation in also advantaximultaneouslv moved vertically in thetube. goons in attacking buildings. no that the 0 6. through themotionof t a propeller. mil-(tibulayj mwlrnto wall into the intro, 115 Thisu-tion continues until the reaction rimbefore exp onion (mum. 1 member86. encounters the abrupt shoulders The other condition under whichdetonaformed at the lower end of the tube depn stion takes place is bydirect impact with sions 2-l25, whereupon the parts come to come solidltllimllt'fl having sufllclant .rraoroot in the position illustrated inFlu. Y. tive capacity to-caunc. the breaking doom of 1 ubm'o. Darin thoupward In actual auction the time interval reqmml all the mn mrarymtainingdevioes employed tooilcct 1 ll in four'and one half seconds, inconnection With both acts of living pine. tho. various chum-.nta ol' thedetouator bring This action may be briefly dcaorilml as folso promrtioned an to prodotnnnino the lows: I V

movement of The retaining pine 32ml the delay fir ng l tbc plunger, t o.blasting m a 50. upturn its plan $0.1m. limt broken down by tbomwtlonreceiving well 69. in tho lottmn of tho ,withuu-mbur an." in the prcvumaumtama', booster mntaimirca'uand the latter yields to by reason of thegreater protrusion of tho Iuriuuuhiftml vertically under the n-ailioncylower and! of the latter ovor'lhonn of tho- Sbnultaneouely with no 05 ofits retaining spring 66. The parts as impact tiring pins.

cally and selectively released to cause the firing of either the time orinstantaneous fuse according to the degree of resistance offered to theprogress of the projectile.

10. A detonating mechanism for an explosive projectile com risingmovable inertia am reactive mcm )ers means for normall maintaining saidinertia and reactive mem ers in fixed relation and for shifting one ofthem into operating position and releasing the other, including a membernor: mally engaging said members but shiftable to disengage it from oneof them; and means controlled by flight of the projectile .for shiftinsaid engaging member as aforesaid.

11. detonatlng mechanism comprising a movable member, and a reactivemember; a screw normall in. threaded engagement with both members tohold the same in fixed relation to )revent accidental detonation; andmeans or rotating the said screw to release one of said members forrelative independent motion upon the release of the projectile.

12. A detonating mechanism comprising a movable member, and a reactivemember; a screw normally in threaded engagement with both members tohold the same in fixed relation to prevent accidental detonation; and anair operated propeller for rotating said screw to release one of saidmembers for relative independent motion upon the release of theprojectile.

13. A detonating mechanism comprising a guide tube; a plunger restrictedto longitudinal movement in the said tube; a fuse associated with saidplun er; a reactive member co-axially alined with said plunger and alsorestricted to longitudinal movement in the said tube; a screw normallyhaving threaded engagement with both the plunger and the reactive memberwhereby said elements are ordinarily held, from relaeffiindcgcndentmotion to prevent accidental 3131081011; and an airoperated propeller 91 ro atin said screw whereby the said plunger is utimately released for independent; motion with respect to said reactiveele ment, in readinessto fire said fuse.

14 A detonating mechanism for an exploslve projectile cmprising anintertiaactuated longitudina 1y movable lunger; a booster cartridgeinterposed in t e path of movement of said plunger; a screw normally inthreaded engagement with said lunger to hold the same spaced from theester cartridge; and means operatedn by the flight of the projectile forrotating said screw to advance said plun er into firing relation to thebooster cartridge.

15. A detrmating mechanism for an explosive projectile comprising aguide tube extending into proximity to the main explosive charge; aplunger restricted to longitudinal movement in the said tube; a boostercartridge interposed in the tube be tween said plunger and the mainexplosive charge; stops for normally determinlng the position of thecartridge n the tube; a retaining spring for villldingly mamtainmg saidcartridge in engagement with its stops; it screw for normally engagingsaid plunger to hold the same in spaced relation with respect to thecartridge; and an air operated propeller for automatically advancing thedanger into engagement with the cartridge in opposition to the retainingspring.

16. A-detonating mechanism for an' explosive projectile comprising amovable member and a reactive member; a screw normally engaging bothmembers to hold the same in fixed relation to prevent accidentaldetonation; an air operated propeller for automatically rotating saidscrew to release one of said members for relative indepond' ent motionupon the release of the projectile; and means for normally locking saidpropeller against rotation, said locking means including a pivotedlinger adapted to project between the blades of the propeller and havinga curved deficctinp edge adapt cd to coc'iperatc' with the propellerblades to permit the operation of the propeller when released; and adetachable scouring means for normally holding said locking linger infixed position.

17. An explosive projectile comprising a body adapted to contain themain explosive charge; a supplemental nose piece attached to said body,with its interior separated from that of said body; a guide tuberemovably secured in the forward and of said nose piece and extendingthcrethrough into the interior of said body; a booster charge in theinner end of said tube, within said body; a detonating device guided insaid tube; and means controlled by the flight of the projectile forshifting said detonating device from a position in said nose piece intofiring proximity to said booster charge; said last-mentioned means beingassociated and

